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Title: Electromechanical And Electronic Readout Devices
Author: W. m. Hannah
Source: 1975 Appalachian Gas Measurement Short Course
Year Published: 1975
Abstract: A counter is basically a storage or memory device used for accumulating or totalizing a series of events, the events in the gas industry being the number of turns a shaft makes which is equal to a specific volume of gas passing through a meter. The counting device on a meter is called an index by the gas industry and the meter manufacturers. The simplest type of counter is a single dial with numerical values around its circumference and a needle which moves from zero to higher and higher values, as an example, the odometer in a vehicle. The index of a utility meter is an extension of the single dial to several dials, each coupled to the other with 10 to 1 direct gearing. The meter reader carefully reads each scale indication lower in value than each digits pointer indicates. The possibility of making an incorrect reading is very great. Counterrotating dials increase the possibility of error, and this introduces serious problems.

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